IN STOCK - OneStringMiner boards, up to 39GH/s last ITEMS: from US$15...FUN!!!

[hephaist0s]

You know what I love? Paying on Tuesday, and having my OSM units in hand and hashing on Friday, all the way from across the ocean.

You know what else I love? Lots of parts included! Cords, screws, spacers, fans all included, so I don't have to hunt all over for some little thing.

And they're tiny, and as silent as you want them to be.

And, oh yeah, all in the neighborhood of ~1W/GH/s. I will run these forever. Thanks again!

[BenTuras]

You know what I love? Paying on Tuesday, and having my OSM units in hand and hashing on Friday, all the way from across the ocean.

You know what else I love? Lots of parts included! Cords, screws, spacers, fans all included, so I don't have to hunt all over for some little thing.

And they're tiny, and as silent as you want them to be.

And, oh yeah, all in the neighborhood of ~1W/GH/s. I will run these forever. Thanks again!

You're very welcome and thank you for the compliments.
I guess it shows that I am a DIY too.

[chek2fire]

I have just received it and i try to get it work because i am new in this. I have some noob questions . First i have this psu

http://www.hardwaresecrets.com/article/402

but i think is in always "OFF" condition and to turn it on you must attached to a motherboard . How can i work psu thinking that is attached to a motherboard to be always on?. I have found this instructions but i dont know if is correct

http://www.electronics-tutorials.ws/blog/convert-atx-psu-to-bench-supply.html

The other questions is that in the miner package was two wires that i dont know the use of them. One other is that the board has two molex. In which one i have to plugged the power? And the last question is that in the board i see a three pin connector for the fan and in the opposite side a four pin connector that i dont know for what is this. Thank you for any advice

[cannachris]

connect green pin to black pin on atx connector and off you go!! 

[chek2fire]

ok thx!  Can you answer and the other question for the cables that come with the board etc.

[Bicknellski]

You know what I love? Paying on Tuesday, and having my OSM units in hand and hashing on Friday, all the way from across the ocean.

You know what else I love? Lots of parts included! Cords, screws, spacers, fans all included, so I don't have to hunt all over for some little thing.

And they're tiny, and as silent as you want them to be.

And, oh yeah, all in the neighborhood of ~1W/GH/s. I will run these forever. Thanks again!

+1 Ben has it dialed in. This is good for the community.

[tinus42]

Do people who pick up these locally get a discount? Since you don't have to pay for shipping costs? I'm not far away from you so that is an option.

[stan258]

Just sent an email to sales@btcguru.eu to order 4 boards.  This is the correct email to order?

[BenTuras]

Do people who pick up these locally get a discount? Since you don't have to pay for shipping costs? I'm not far away from you so that is an option.

I can give you a little discount, shipping cost is not much for us since we're shipping a lot and we have negotiated a nice deal with FedEx.
Just email your order, specify local pickup and I will get back to you with an invoice that shows your discount

[BenTuras]

I have just received it and i try to get it work because i am new in this. I have some noob questions . First i have this psu

http://www.hardwaresecrets.com/article/402

but i think is in always "OFF" condition and to turn it on you must attached to a motherboard . How can i work psu thinking that is attached to a motherboard to be always on?. I have found this instructions but i dont know if is correct
http://www.electronics-tutorials.ws/blog/convert-atx-psu-to-bench-supply.html

Perfect power supply, can easily power 20 boards and probably more.
And those instructions are correct, connect green to black and the psu will work.

The other questions is that in the miner package was two wires that i dont know the use of them. One other is that the board has two molex. In which one i have to plugged the power?

Those two wires are only needed when you have more than one board.
The black/red wire is for power, and utilizes the green screw terminals on the board.
The other wire is for serial communication, for which we're fine tuning the firmware at the moment.

And the last question is that in the board i see a three pin connector for the fan and in the opposite side a four pin connector that i dont know for what is this. Thank you for any advice

The four pin connector is for the serial communication.
Once you have multiple boards and the firmware is finished you will use that connector.
For now we're supplying USB cables for every board purchased.

[BenTuras]

Just sent an email to sales@btcguru.eu to order 4 boards.  This is the correct email to order?

Yes, we've received your order, thank you

[BenTuras]

You know what I love? Paying on Tuesday, and having my OSM units in hand and hashing on Friday, all the way from across the ocean.

You know what else I love? Lots of parts included! Cords, screws, spacers, fans all included, so I don't have to hunt all over for some little thing.

And they're tiny, and as silent as you want them to be.

And, oh yeah, all in the neighborhood of ~1W/GH/s. I will run these forever. Thanks again!

+1 Ben has it dialed in. This is good for the community.

Thank you for the compliment

[Taugeran]

Absolutely loving my 2 DIY0 each running at 28 Ghash. And nary a whisper is louder than the fans I'm using

2 questions for you Ben. Any update on the Version command error I pointed out.


And one open to the floor but directed at Ben and cscape: is it ok to run these long term at 70-75C?

[cscape]

And one open to the floor but directed at Ben and cscape: is it ok to run these long term at 70-75C?

The higher the temperature, the quicker the chips will wear out, but I don't have hard figures about the expected lifetime at different temperatures. (I don't know that anybody has ever done a thorough characterization) However, considering that the reward of mining goes down as the difficulty rises, I would expect the optimal to be closer to 70-75 than to 50-55. But that's just a WAG.

[Luke-Jr]

it is plainly clear that the firmware shipped on the OSM boards is hard coded with a response the version command. if this is so and you have access to the source it would need modified to 15. if not could you request cscape recompile a fw specifically for the OSM boards with this modification.

Following this post, i will be trying to hack together a modification to bfgminer's Bifury driver to see if this fixes the poor performance.

the issue lies in the way bfgminer uses the FW response to VERSION to allocate and setup the queue. since it replies only 2 chip in the response the other 12 are left hungry as f*** and any values they find arent being logged since as far as BFG knows they dont exist

BFGMiner uses the chip count only to determine how many chips will be returning submits, not to determine how much work is needed.
Although earlier Bi*fury firmwares were buggy, for which BFGMiner's driver has code to workaround until it receives the first needwork message, but I don't see how that could affect this.

I'll be quite honest bfgminers BiFury driver needs a lot of work. Just from looking it seems that on every poll it tells the device to flush, set target, and set maxroll. No idea how much workload that is on the PIC but I'm sure several times a second can't be light.

No, it only sends these once on initialisation (device open)...
Flushing occurs when there is a work update too.

Also, a low maxroll value is also bad for performance. For instance, with maxroll = 0, a single OSM board needs about 11-12 work items per second to keep busy. And if the boards are chained through the serial link, they could require nearly 200 work items per second. That's a lot. Setting maxroll to 60, only requires 1/60th of the workload, so about 1 work item every 5 seconds for a board.

There is definitely room to improve this, but it wasn't necessary for bi*fury and incompatible with getwork pools.

In addition, it is good to send the pool difficulty to the board using 'target' command, to avoid unnecessary traffic going the other way.

BFGMiner uses diff 1 nonces to provide more reliable statistics.
Perhaps this can be made configurable if there's a need.

As for why it's performing worse, I'd be happy to look into it.
Are you planning to send a sample unit to developers?

[Taugeran]

Luke, I'd like to take this chance to publicly apologize about the somewhat rude criticisms i posted. i did not do my due diligence in ensuring that what i was posting was truth before doing so.

[chek2fire]

Unfortunately my old psu is off. It has problem and i though i can make it work but i cant. For that i must buy a new one. I see that each board needs 25w to work. What is your opinion to choose a cheap 550-600w psu or a good 400-500w. I think in the next months to buy more boards. Thank you for any advice

[Taugeran]

Unfortunately my old psu is off. It has problem and i though i can make it work but i cant. For that i must buy a new one. I see that each board needs 25w to work. What is your opinion to choose a cheap 550-600w psu or a good 400-500w. I think in the next months to buy more boards. Thank you for any advice

How many boards?

A decent quality 4-500w psu should be good. Just make sure and double check how much of that wattage is 12V rails

Ex I've got a thermaltake TR2 430W 12V1 is 17amps and 12V2 is 18A

But what it didn't say on the box was that 12V2 was and eps 4+4 connector. So I had to go on the inter webs and find an eps8 to pcie 6+2 adapter.



In all I've got right around 160gh in hardware + all USB hubs and controllers running off of 430W. No idea how much head room I have for expansion.

See setup: https://bitcointalk.org/index.php?topic=7216.msg5819541#msg5819541

[stan258]

Anybody run Cgminer from windows? I might have to for a few days until i get another PI.

[wttbs]

Unfortunately my old psu is off. It has problem and i though i can make it work but i cant. For that i must buy a new one. I see that each board needs 25w to work. What is your opinion to choose a cheap 550-600w psu or a good 400-500w. I think in the next months to buy more boards. Thank you for any advice

Don't buy a BeQuiet Pure Power L8 600W. It only supplies 11.5V on the PCI-E connectors. It's realy weird but I measured it with a Fluke Voltmeter 11.5V is the max. Then I took a SeaSonice S12G and this PSU works just fine at 12 V.

I think you should best use am adjustable PSU. For example one like Intron suggested: http://www.ebay.com/itm/30-Amp-12-Volt-DC-13-8V-Regulated-Power-Supply-for-Ham-Radio-CB-US-SELLER-/360874766820

On these type of PSU you canadjsut the output voltage, sometimes even up to 13.5V or higher.

I use this one http://dx.com/p/12v-10a-iron-case-power-supply-silver-ac-110-220v-124302 on 4 boards @ 13.1V and it works just fine. They hash at 33 to 35GHs with thermalpasta+heatsink+fan(s). Take notice that if you overclock/volt them warranty voids.